Here's attempts with a glass of water and settings "caustics".
looking good, Marek and I
do know it's not easy. Sometimes the slightest adjustment with the materials IOR values makes it or breaks it.
"What do I know, I'm still learning"..
Windows 7 64 bit HP > on a stock HP laptop with 4gb-2.4 GHz.Turbocad 2019-2018-2017, TurboCad Platinum 21.Using LightWorks, Anilab lab 5. ATI Mobility Radeon HD 4500/5100 and HP all in one desktop with Nvidia Geforce 210, open gl 3.3